Rats They destroy and contaminate foodstuffs, damage buildings and materials and spread disease. Mice Similar to rats in many respects, however, understanding the differences in their biology and behaviour is key to effective control. Cockroaches.... ...Fleas, Wasps, Ants, Silverfish, Booklice, Bedbugs. These pests present significant public health risks, they spread disease, contaminate food stuffs and carry a social stigma. Flies... ...Lice, Red Mites. They cause continual irritation to both livestock and humans and spread disease. © Sorex 2003. All Rights Reserved.   Sorex Limited is a registered company in England, no. 469788.  Read Legal Disclaimer.